Cartier Tank Francaise in 18k & stainless steel & stainless steel. With date. 25 mm case size. Ref W51012Q4. Fine Pre-owned Cartier Watch. Certified preowned Classic Cartier Tank Francaise W51012Q4 watch is made out of Gold and steel on a Gold & Steel Link band with a Stainless Steel buckle. This Cartier watch has a 25 x 21.5 mm case with a Rectangle caseback and. Circa: 2000s . It is Gray and Sons Certified Authentic and comes backed by our 12-month warranty. Each watch is inspected by our certified in-house Swiss-trained watchmakers before shipment including final servicing, cleaning, and polishing. If you have inquiries about this Cartier Tank Francaise watch please call us toll free at 800-705-1112 and be sure to reference W522660.